* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.clearfix:after {
    visibility: hidden;
    clear: both;
    display: block;
    content: ".";
    height: 0
}

.clearfix {
    *zoom: 1
}

.w {
    width: 500px;
    margin: 0 auto;
}

a {
    text-decoration: none;
    color: #000;
    font-size: 400;
}

li {
    list-style: none;
}